语音电路应完成预录三段提示音，分别是“家里有盗贼入侵，请及时赶回”。同时，在电话接通后，可以将语音分段播放。根据系统的功能要求，系统选择了美国ISD公司的ISD1420语音芯片。-Voice circuit should be completed three pre-recorded audio prompts are " thieves at home invasion, please rush back in time."　At the same time, the phone connected, you can sub players voice. Functional requirements of the system, the system has chosen the company' s United States ISD voice chip ISD1420.